CPT 23800Surgery

Arthrodesis glenohumeral jt

CPT 23800 covers shoulder fusion surgery where the surgeon permanently joins the upper arm bone to the shoulder blade, eliminating motion at the glenohumeral joint. This procedure is typically performed when severe arthritis, infection, or traumatic injury has destroyed the shoulder joint beyond repair.

Showing rates for

National Average

Base Medicare rate

$1,012.45

This calculator gives a typical-case estimate using standard Medicare modifier rules. Actual payment depends on payer policies, documentation, code-specific CMS status indicators, and locality. Verify before billing.

RVU breakdown

Work RVU

14.73

PE RVU (NF)

13.57

MP RVU

Total RVU

31.3

Conversion factor: 32.3465 · Source: CMS MPFS RVU25A · Confidence: High

NCCI bundling edits

Loading bundling edits…

Billing tips

Document failed conservative management comprehensively, including minimum 6 months of non-operative treatment with physical therapy records, imaging showing progression, and trial of at least 2-3 corticosteroid injections. Most payers require extensive conservative treatment failure documentation before approving arthrodesis.
Impact: Missing conservative treatment documentation is the #1 denial reason, delaying payment by 30-60 days during appeal. Proper pre-authorization with complete records can prevent $1012.45 claim denial.
Submit pre-authorization with detailed operative plan 2-3 weeks before surgery, including diagnosis codes, prior surgical history, photos/imaging demonstrating joint destruction, explanation why arthroplasty is contraindicated, and patient's occupational demands requiring fusion stability.
Impact: Pre-authorization approval reduces denial rate from approximately 35% to under 5% for this procedure. Retroactive authorization appeals add 45-90 days to payment timeline.
Do not separately bill bone graft procurement from same shoulder or adjacent iliac crest if used for fusion; this is included in 23800. However, structural allograft or bone graft substitute materials may be separately billable with appropriate supply codes and invoice documentation.
Impact: Improper unbundling of included bone graft (20900, 20902) triggers audits and potential recovery of $200-400 in overpayments plus penalties. Legitimate allograft material reimbursement can add $300-800 when properly documented.
Specify exact fixation method in operative note (plate and screw construct, intramedullary device, compression screws) and position parameters (degrees of abduction, flexion, rotation). Some payers audit whether technique matches accepted surgical standards for arthrodesis.
Impact: Vague operative descriptions increase post-payment audit risk. Detailed technical documentation reduces audit findings by approximately 60% and supports medical necessity if complications occur requiring modifier 78 billing.

Live Field Datano reports yet

Real billers contribute denial patterns and appeal strategies for this code. Once 5+ reports come in, you’ll see live aggregated data here — the only place this exists, free.

Working with CPT 23800?

Get the free Revenue Protection Toolkit — the denial triggers, modifier pitfalls, and bundling conflicts that quietly cost you reimbursement. Instant download.

Help build the field knowledge

MedPayIQ gets smarter as billers contribute. If you've had this code denied, share what happened so others learn from it. Anonymous, no patient info.

Related actions

Common denials

Medical necessity not established - payer indicates patient is candidate for shoulder arthroplasty rather than arthrodesis, or conservative treatment not adequately documented as failed.

How to appeal: Submit appeal with peer-reviewed literature supporting arthrodesis indication for patient's specific condition, detailed conservative treatment timeline with dates and outcomes, explanation why arthroplasty is contraindicated (age, activity level, bone quality, infection history), and letter of medical necessity from surgeon. Include patient occupation/lifestyle factors requiring stable fusion rather than arthroplasty motion. Success rate improves significantly with biomechanical explanation of why fusion is superior for this patient.

Experimental/investigational determination - some payers classify glenohumeral arthrodesis as outdated or not evidence-based, preferring modern arthroplasty techniques even when clinically inappropriate.

How to appeal: Provide current CPT status (active, non-investigational code), clinical practice guidelines from AAOS supporting arthrodesis for specific indications, case series demonstrating outcomes, and patient-specific contraindications to arthroplasty. Reference Medicare's acceptance and payment as evidence of established standard of care. Consider peer-to-peer review with payer's medical director to discuss case specifics.

Bundling denial - payer bundles separately billed procedures such as hardware removal from prior surgery, extensive debridement, or bone grafting into the arthrodesis code.

How to appeal: Appeal with operative note clearly documenting separate procedures performed through different incisions or requiring significant additional time beyond typical arthrodesis. For hardware removal, show it was from prior unrelated surgery, not staged arthrodesis. For bone grafting, demonstrate structural grafting beyond routine fusion technique. Include timeline breakdown showing additional operative minutes. Use modifier 59 or X{EPSU} modifiers appropriately.

Incorrect coding - payer suggests alternative code such as 23802 (glenohumeral arthrodesis with autograft) is more appropriate, or questions whether procedure was actually performed at acromioclavicular joint (23044) instead.

How to appeal: Submit complete operative report highlighting specific anatomic details confirming glenohumeral joint fusion (humeral head to glenoid), description of cartilage removal from these specific surfaces, and fixation placement across glenohumeral articulation. If autograft was used, determine whether 23802 is indeed more accurate code (review operative note for documentation of autograft harvest and incorporation). Clarify any anatomic confusion with diagrams showing glenohumeral versus AC joint location.

Frequently asked questions

What is the Medicare reimbursement rate for CPT code 23800 in 2025?

The 2025 Medicare national average reimbursement for CPT 23800 is $1012.45 for both facility and non-facility settings. This rate is calculated using 31.3 total RVUs multiplied by the 2025 conversion factor of 32.3465. Actual payment may vary by geographic locality based on GPCI adjustments, with rates typically ranging from approximately $850 to $1,150 depending on location.

Does CPT 23800 include bone grafting or is that billed separately?

CPT 23800 includes routine bone grafting obtained from the same shoulder or local site as part of the fusion preparation. Separate billing for autograft harvest (20900, 20902) from the same operative field is considered bundled and inappropriate. However, if significant structural allograft is used or autograft is harvested from a distant site like iliac crest requiring separate incision, code 23802 (arthrodesis with autograft) may be more appropriate, or allograft materials may be separately reportable through supply codes with supporting invoices.

When should I use CPT 23800 versus 23802 for shoulder arthrodesis?

Use CPT 23800 for glenohumeral arthrodesis when using standard fusion technique with local bone from joint preparation or minimal local graft. Use CPT 23802 when the procedure specifically requires obtaining autogenous bone graft from a separate donor site (typically iliac crest) that involves additional incision, harvest time, and complexity beyond routine fusion. The key distinction is whether substantial autograft harvest from a distant site is documented as integral to achieving fusion, which would support 23802 rather than 23800.

What modifiers are required when billing CPT 23800?

Laterality modifiers RT (right) or LT (left) are mandatory for CPT 23800 and claims will deny without them. Additional modifiers should be used when appropriate: modifier 22 for significantly increased complexity/time with detailed documentation, modifier 50 for bilateral procedures (rare), modifier 62 for co-surgery requiring two surgeons, modifier 78 for related return to OR within global period, or modifier 59/X{EPSU} to indicate distinct procedural service when billing potentially bundled procedures separately.

What is the global period for CPT 23800 and what does it include?

CPT 23800 has a 90-day global surgical period. This includes all preoperative visits (typically 1 day prior), the procedure itself, and all routine postoperative care for 90 days including hospital visits, office visits, fusion assessment, suture/staple removal, and immobilization device adjustments. Complications requiring return to OR are billed with modifier 78 or 79 depending on whether related to original procedure. New problems unrelated to the arthrodesis can be billed separately with modifier 24 on E/M services during the global period.

How do I appeal a medical necessity denial for CPT 23800?

To appeal a medical necessity denial for glenohumeral arthrodesis, submit: (1) comprehensive conservative treatment timeline showing 6+ months of failed therapy, injections, and medications with dates; (2) imaging demonstrating severe joint destruction; (3) peer-reviewed literature supporting arthrodesis for the specific indication; (4) detailed explanation why arthroplasty is contraindicated (patient age, activity level, bone quality, infection risk, neuromuscular factors); (5) patient occupation and functional demands requiring stable fusion; and (6) letter of medical necessity from operating surgeon. Request peer-to-peer review with medical director if initial written appeal denied.

What diagnosis codes support medical necessity for CPT 23800?

Diagnosis codes that typically support medical necessity for glenohumeral arthrodesis include: M19.011/M19.012 (primary osteoarthritis of shoulder), M12.511/M12.512 (traumatic arthropathy), M86.811/M86.812 (chronic osteomyelitis following joint infection), M96.661/M96.662 (fracture of humerus following insertion of orthopedic implant indicating failed arthroplasty), S42.291A/S42.292A with sequela code (severe fracture-dislocation with post-traumatic arthritis), and T84.053A/T84.054A (infection and inflammatory reaction due to shoulder prosthesis). Documentation must clearly link diagnosis to joint destruction requiring fusion and explain why arthroplasty is not suitable.